Bifunctional Catalysts with Separated and Tunable Sites on Zeolites for Relay Catalysis of the Oxidative Dehydrogenation of Propane Using CO₂

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Дек. 8, 2024

Abstract The oxidative dehydrogenation of propane using CO 2 (CO ‐ODH) technology has broad application prospects in the production propylene and utilization , development efficient ‐ODH catalysts is great significance. However, it remains a challenge to develop highly catalyst that can activate both C─H C═O. Herein, PtZn/Co@S‐1 with very low precious metal content 0.2 wt.% reported. Benefiting from PtZn 4 nanoclusters dispersed on surface Silicalite‐1 zeolite tetrahedrally coordinated Co 2+ framework via relay catalysis, independent dual sites structure (PtZn/Co@S‐1) greatly promotes reaction high conversion rate C 3 H 8 (59.7%) (44.3%), selectivity 94.9%, thus upsetting equilibrium for direct propane. Experimental measurements density functional theory calculations suggest interfaces are likely carbon dioxide hydrogenation active respectively.

Язык: Английский

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Mechanistic interpretations and insights for the oxidative dehydrogenation of ethane with CO2 over alkali metal modified Zn/SSZ-13 catalyst

Molecular Catalysis, Год журнала: 2025, Номер 579, С. 115044 - 115044

Опубликована: Март 27, 2025

Язык: Английский

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Catalytic hydrogenative depolymerization of castor shells C-lignin to catechols over the mixed Pd/C + Pd(OH)2/C System

Industrial Crops and Products, Год журнала: 2025, Номер 228, С. 120913 - 120913

Опубликована: Март 31, 2025

Язык: Английский

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Unraveling the Unique Behavior of Atomically Dispersed Pt on Zeolite Fe-DeAlBEA for Catalyzing Propane Dehydrogenation with Cofed Hydrogen

Journal of the American Chemical Society, Год журнала: 2025, Номер unknown

Опубликована: Апрель 11, 2025

Propene, used on a large scale to manufacture polypropylene and several commodity chemicals, is increasingly produced by catalytic propane dehydrogenation (PDH). Atomically dispersed Pt has emerged as promising candidate catalyst for PDH; however, stabilizing atomically at high temperatures challenging. Here, we demonstrate the use of dealuminated zeolite beta with Fe content host isolated Pt, which anchored strongly support Pt-Fe bonds. The sites exhibit PDH performance, including apparent forward rate coefficient propene formation (404.8-26.4 mol propene/mol Pt·bar·s) selectivity (≥96%) 823 K in presence H2. Kinetics data characterizing range loadings show that catalyzes rates independent H2 partial pressure, whereas metallic clusters, formed loadings, catalyze reaction slightly negative dependence pressure. shift speciation loading, confirmed infrared spectroscopy adsorbed CO, X-ray absorption spectroscopy, high-angle angular dark field scanning transmission electron microscopy, suggests observed change kinetics dispersion consequence mechanism.

Язык: Английский

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Modulation of acidic–basic and metal–carrier interactions in CO₂-assisted propane dehydrogenation over Ga₂La_x/ZSM-5 catalysts

New Journal of Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

La effectively promotes propylene production over Ga/ZSM-5 catalyst in CO 2 -ODHP.

Язык: Английский

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